Shaxx waits eagerly for you in his Hall.

"I'm not done with you yet, Guardian. I've got one last challenge for you, and one more prize awaiting your success."

"Every round of training, every fight I've pushed you into, every piece of gear you've earned—it makes you better. Readier to face the Witness itself. I'm sending you back in against The Pantheon. It'll be a test of endurance as much as skill."

Shaxx laughs. "If you can succeed in this test, I'd say you were ready to challenge me for my remaining horn."

He pauses, and adds, "Almost."